Steam-boiler



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STEAM BOILBR.'

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STEAM BOILEYR.

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No. 372,855. Patented Nov. 8, 1887.

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No. 372,855. Patented Nov. 8, 1887.

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UNITED STATES PATENT UEEICE.

FRANK E. LANDIs, oE wAYNEsEoEoUGH, PENNSYLVANIA.

STEAM-BOILER.

SPECIFICATION forming part of Letters Patent No. 372,855, dated November8, 1887.

'Application filed January 18, 1886. Serial No. 1788.895. (No model.)

To aZZ whom it may concern.-

Beit known that I, FRANK F. LANDIs, a citizen of the United States,residing at Waynesborough, in the county of Franklin and State ofPennsylvania, have invented certain new and useful Improvements inSteam-Boilers, of which the following is aspecification, reference beinghad therein to the accompanying drawings.

My invention relates to improvements in steam-boilers fortraction-engines or boilers subjected to motion and changes in theirlevel; and the objects of my improvements are to produce a boiler thatcan be easily taken care of by inexperienced persons, and at the sametime possessing lightness and great strength, containing a smallquantity of water at a time, but still covering the crown-sheet to agood depth, whatever may be the level of the boiler in descending hills.It is an improvement upon thesteam-boiler for which I obtained a patentJanuary30,1883, No. 271,477, and although said boiler meets all therequirements of a traction-engine traveling upon level or hilly roads,as very little steam is used in descending hills, it may yet happen thatif said engine is used in plowing and has to expend much steam whileworking in descending a long hill the level of the water around thelirebox may be so loweredvas to expose the crownsheet before reaching alevel piece of ground, and thus having a good depth of water restoredabove the crown-sheet.

The object of the present improvement is to prevent the often violentebullition in the rear of the steam-chamber at the point where the steamescapes from around the fire-fines by increasing the number ofescape-openings andshortening the path followed by the steam. n

I attain these objects by the construction illustrated in theaccompanying drawings, in which- Figure 1 is a longitudinal verticalsection of a boiler constructed in accordance with my invention. Fig. 2is a transverse vertical section o f the same through line x x ofFig. 1. Fig. 3 is a transverse vertical section through thesteam-passage on line y of Fig. 1. Fig. 4 is a longitudinal verticalsectionv of a boiler, showing my invention slightly modified in form.Fig. 5. is a transverse vertical section on line w x of Fig. 4. Fig. 6is a transverse vertical section through the steam-passage on line yy ofFig. 4. Fig.7 is a vertical section of a steam-passage madewith aiiaring entrance. Fig. Sis a longitudinal vertical section of a boiler,showing my invention slightly modiiied in form. Fig. 9 is a transversevertical section on line 00 x of Fig. 8. Fig. 10 is a vertical section,on a large scale, of a hollow screw-plug and a fusible ball dropped andalso l compressed therein. Fig. 11 is a side view of a ramrod andconical fusible plug.

In said drawings, A represents the fire-box;

B, the crown-sheet; C, the iiues; D, the stationary lower portion of thestack; E, the

vsteam-dome, and E the steam-supply pipe, all

`and to the shell. The upper edge of the rear head, I', terminates in arearwardly-projecting iiange, i, to arrest in part the water that maysurge against said rear head. The horizontal partition and the two headsform, in connection with the shell, a chamber, G', separate 4from theilue portion of the boiler, and directly communicating with thesteam-dome, and also limiting the forward end of asecond compartment, B,immediately overthe crownsheet B, through which compartment extends asubstantially horizontal pipe, J, oue'end of which is secured in thehead I', adjacent to the bottom of the chamber G', for the escape ofwater entering said chamber.

Near the top of the forward head, I, and secured therein, is a pipe, l?.(Shown in dotted lines in Fig. 1 and in full lines in Fig. 4.) Itcommunicates with the forward end of the due-chamber of the boiler andextends rearwardly to within a short distance of the rear end of theboiler, where it discharges steam close to the under side of, the shellof the boiler.

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At some point between the center of the length of the chamber G and therear head, I', their is riveted transversely to the bottom G a narrowantechamber or steam-receiving chamber, K, one shape of which is showniu Fig. 3, being a section on line g/ of Fig. l. rfhe bottom of thechamber K is open, and communicates with the vflue-space under thebottorn G, said bottom being cut through at that point to form anopening having tac lenglh and width of the chamber K. To the rear wallof this chamber, and at the highest point thereof, as shown in 3, issecured a pipe, L, that also extends to within a short distance of therear end of the boiler for the purpose of taking to that point the steamthat is generated from the flue-surface under that part i of thc bottombetween the opening under the chamber K and the front head, I, of theboiler while pulling down hill, and therefore only one-half of the steamgenerated under thc bottom G will escape through the space between thelire-box and the rear head, I, and the steam-agitation at that pointwill hc much less violent; and while going up hill the steam from thetubesurfaee between the fnebox and the chamber K will escape through thechamber K and pipe L, and will reduce the agitation at the front end.

In the forward portion of the steam-pipes I? and L small perforations care made in the upper surface, to allow the steam to escape therethroughclose under the highest point in the boiler, even if the rear ends ofsaid pipes were covered with water, as when cending a very steep grade.

rIhe invention has been described as shown in Figs. l, 2, 3; but lvprefer the formand arrangement shown in Figs. i, 5, 6, as being simplerand still more effectual in overcoming the trouble caused by the steamissuing through the watersurface close to the rear partition, I.

In the last-stated figures the partition Il forms the rear wall of thechamber K, and it has a pendent flange, F, which extends down to the topof the upper row of ilues, C. This Harige F will cause nearly all thesteam from the entire tube-surface to pass up through the chamber K. Thepipe J is fastened into a sleeve that passes through both walls of -thcchamber K, while the pipe L extends only through the highest part of therear wall, I, of said chamber. Instead of maliingthe walls ofthe chamberK parallel, they may be placed at an angle to each other, or the frontwall inclined, so that thc chamber will be wider at the bottom, as shownin Fig. 7, to facilitate the entrance ofthe steam generated under thefloor G.

In the boiler shown in Figs. S and 9 the steam drum is well forward, asin my former patent; butit has, about half-way of its steamchamber G, anarrow transverse steam-receiving chamber, K, as described in regard toFig. l, and through the walls of said chamber passes a pipe, J, to draintoward the rear the water that may enter into the forward compartment.The partition I of the rear compari ment has also a pipe, J', passingtherethrough for the same purpose.

It sometimes happens that when a traction-engine is on the road it willget so short of water that the crown sheet will be uncovered and thefusible plug secured in said erownsheet will become melted. It is thendifficult to have a new one inserted, as the tire must be all d rawn outfrom the fire-box and the boiler left to cool, and the engine-drivermust either enter the fire-box and unscrew the plug B2, to insert a newfusible plug, b, or he must open a handhole for the same purpose, and byeither means it causes a long dctention. To obviate this I prefer touseascrewtapped plug, B2, having its upper end provided with a cavity toreceive a plug of soft metal, preferably in the form of a ball, b, or aslightly-conical plug, b. The cavity in the screw tapped plug B2 ispreferably provided with an annular groove, b3, to' receive a portion ofthe 'soft metal when forced therein with a ramrod, B, and thereby retainthe fusible plug when the boiler cools, the lower temperature causing avacuum in the boiler; and in line with the axis ofthe hole made in thecrown-sheet to receive the plug B2 another hole is made in the shell ofthe boiler, both holes being cut and screw-threaded at the same time,and in the upper hole is inserted a tube, bt, of such length that itwill extend to within about a quarter of an inch from the plug B2, andthrough this tube a new fusible plug can be dropped into the opening ofthe plug B2 and driven therein with a round bar of iron having its endflat. The bar or ramrod is then removed and the upper end of the tube b2closed with a solid screw-threaded plug, b5, and all is ready to starton the road again.

Although I have shown and fully described a fusible plug and its mode ofinsertion in and attachment to a boiler, I make no claim thereto in thepresent case.

Having now fully described my invention and its operation, I claiml. Ina steam-boiler constructed with lines, a compartment having a floorlocated above said flues to arrest a body of water, an opening` in thisdoor leading into a passage having side walls united at the top andextending into said compartment, and provided with an opening in therear wall of said passage, substantially as described.

2. In a steam-boiler constructed with fines, a compartment having a doorlocated above said dues, an opening in the floor, a passage having sidewalls extending up into said cornpartment, and a water-discharging pipe,J, issuing from the rear of said compartment, substantially as and forthe purpose described.

3. In a steam-boiler, a compartment having a floor located under thesteam-dome, a head at each end, anda pipe, I), passing through IOO IIO

both heads, substantially as pose described.

4. I'n a steam-boiler constructed with fines, a compartment having afloor located above Said dues, a head at each end and between said headsa chamber having an opening into the Hoor of the compartment, and apipe, L, extending out from the rear of said chamber, Substantially asand for the purpose described.

5. In a steam-boiler` constructed with iiues, a compartment having afloor located above said flues, a head at each end and vbetween saidheads a chamber having an opening into the door of the compartment, anda ange, F, pendent from said door adjacent to said openand for the pur-Ia flange, as F, under the rear Wall thereof, and

extending down to the top of the fiues of a boiler, a pipe, J, passingthrough both Walls of said chamber, and a pipe, as L, inserted into therear. head only of said chamber, substantially as and for the purposedescribed.

In testimony whereof Iaix my signature in presence of two Witnesses.

FRANK F. LANDIS. Witnesses:

JNO. B. RUSSELL, ALF. N. RUSSELL.

